70397561 has 16 divisors (see below), whose sum is σ = 81648000. Its totient is φ = 60112128.

The previous prime is 70397557. The next prime is 70397563. The reversal of 70397561 is 16579307.

It is a cyclic number.

It is not a de Polignac number, because 70397561 - 2² = 70397557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70397563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10340 + ... + 15738.

It is an arithmetic number, because the mean of its divisors is an integer number (5103000).

Almost surely, 2^70397561 is an apocalyptic number.

It is an amenable number.

70397561 is a deficient number, since it is larger than the sum of its proper divisors (11250439).

70397561 is a wasteful number, since it uses less digits than its factorization.

70397561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5488.

The product of its (nonzero) digits is 39690, while the sum is 38.

The square root of 70397561 is about 8390.3254406489. The cubic root of 70397561 is about 412.9072776972.

The spelling of 70397561 in words is "seventy million, three hundred ninety-seven thousand, five hundred sixty-one".